Sistema para medição da atenuação devido à chuva em enlaces de satélites na banda Ku

• Ano de defesa: 2012
• Autor(a) principal: Miranda, Glauber Paz
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Uberlândia; BR; Programa de Pós-graduação em Engenharia Elétrica; Engenharias; UFU
• Palavras-chave em Português: Atenuação; Chuva; Satélite; Banda Ku/Ka; Antenas; Sistemas de telecomunicação; Attenuation; Rain; Satellite; Ku/Ka Band; Antenna; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA
• Link de acesso: https://repositorio.ufu.br/handle/123456789/14488; https://doi.org/10.14393/ufu.di.2012.312

Among the several impairmentes suffered by an RF satellite signal above 10GHz , the attenuation due to rain, is which causes the most significant and detrimental effect. This attenuation requires reserving a considerable margin in the system project; which leads to increase in power, the use or larger antennas or complex error correction techniques, consequently, leading to increased costs. This work describes the design, construction and operation of a receiving system in the Ku / Ka band to measure, date and store the instantly value of both the attenuation and the rain rate, in order to build a database, which allows to study and compare the data obtained the light of the theoretical models used in the projects. The system has a parabolic antenna 4.2 m in diameter with angular movement in elevation and azimuth axes using electric motors, a station for collecting environmental data and an unmodulated carrier receiver (beacon). The antenna was designed to allow a measuring range up to 28dB of attenuation in the signal, considering the typical transmitted signal levels of the satellites currently in geostationary orbits.